EP0728523B1 - Cylindre, procédé pour la fabrication d'un cylindre et broyeur à cylindres à lit de matière - Google Patents

Cylindre, procédé pour la fabrication d'un cylindre et broyeur à cylindres à lit de matière Download PDF

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Publication number
EP0728523B1
EP0728523B1 EP95120153A EP95120153A EP0728523B1 EP 0728523 B1 EP0728523 B1 EP 0728523B1 EP 95120153 A EP95120153 A EP 95120153A EP 95120153 A EP95120153 A EP 95120153A EP 0728523 B1 EP0728523 B1 EP 0728523B1
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EP
European Patent Office
Prior art keywords
roll
profile
hard material
profile grooves
approximately
Prior art date
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Expired - Lifetime
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EP95120153A
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German (de)
English (en)
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EP0728523A1 (fr
Inventor
Heinz Dipl.-Ing. Schröder
Oswald Dipl.-Ing. Haberhauer
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ThyssenKrupp Industrial Solutions AG
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Krupp Polysius AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B02C4/305—Wear resistant rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/906—Roll or coil
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/49547—Assembling preformed components
    • Y10T29/49549—Work contacting surface element assembled to core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/49547—Assembling preformed components
    • Y10T29/49549—Work contacting surface element assembled to core
    • Y10T29/49554—Work contacting surface having annular axial sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/4956—Fabricating and shaping roller work contacting surface element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • Y10T428/12396—Discontinuous surface component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/2457—Parallel ribs and/or grooves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/24983—Hardness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2978—Surface characteristic

Definitions

  • the invention relates to a roller according to the Preamble of claim 1 and a method for Production of a roller, according to the preamble of the claim 14; it also relates to a material bed roller mill for crushing brittle regrinds, according to the preamble of claim 22.
  • a roller of the prerequisite in the preamble of claim 1 is related to a Gutbettwalzenmühle described in DE-A-42 10 395.
  • this known embodiment is a Chilled cast iron roll jacket exchangeable on a roll base attached, also on the outside or outer circumferential side of this roll shell profiling welding beads according to certain patterns in the Way can be applied that a profiled Wear protection armor with outwardly protruding hard material strips applied by build-up welding and recesses in between results in which regrind particles are pressed or pressed are and therefore an autogenous wear protection for form the surface of the jacket.
  • a good intake capacity of the material to be shredded Good in that between the two rollers Grinding gap created.
  • the invention is based on the object, a Roll according to the preamble of claim 1, a method for the production of a roller according to the generic term of claim 14 and a material bed roller mill there according to the preamble of claim 22 further develop that a particularly durable wear protection the roller surface and a reliable one Good collection and interaction of such Rolling even with relatively low consumption of hard material can be guaranteed.
  • trained roller thus become the wells the profiled wear protection armor not only by the material height or material thickness of the the outside of the roll shell by hard overlay welding applied hard material strips determined, but on the one hand through the - radial - depth that from the outside of the peripheral jacket area profile grooves worked into the roller material and on the other hand, from the material height or thickness of the hard material strips. Because these hard material strips only on between the profile grooves or between the profile grooves existing or stopped, web-like Profile projections are welded on, the Roll design according to the invention compared to the known Rollers, in particular grinding rolls, thereby optimized that relatively little of the relatively expensive, highly wear-resistant hard material can be used got to.
  • the profile grooves have a cross section with a Depths: width ratio of about 0.4 to 0.75 have, the profile depth - as already indicated - by the sum of the radial web height of the elaborated profile projections and the radial material height the hard material strip is formed. On this way, a particularly high stability of profiling created. It is also special advantageous if the material height of the hard material strips depending on which to load or processing material about 3 to 15 mm, preferably about 4 to 8 mm. Appropriately have the Profile grooves have a maximum cross-sectional width of about 30 to 40 mm.
  • the hard material strips from a metal matrix with tungsten carbides embedded in it are produced, whose particle size is about 0.1 to 2 mm, preferably about 0.2 to 1.2 mm and their volume fraction about 50 to 80% of the total volume of the welded hard material strips is.
  • a good bed roller mill for shredding brittle Regrind is characterized in that the wear protection armor each of the two grinding rollers installed there at least in the previously described invention Way is executed.
  • rollers designed according to the invention in particular preferably as grinding rollers for comminution brittle regrind in a material bed roller mill can be used, although these rollers also in almost similarly in a roller press or the like. can be installed where there are often similar conditions or stresses can exist if a such a roller press for pressing any mineral goods, e.g. Coal, fertilizer or Like., Is used.
  • any mineral goods e.g. Coal, fertilizer or Like., Is used.
  • roller body 6 contains a roller body 6, whose annular outer peripheral area is a kind Has roll shell or a peripheral shell region 7, which is particularly illustrated in this Fig.2 is.
  • the roller body 6 together with its peripheral jacket area 7 can according to the invention from a pressure-resistant and well weldable roller base material, for which any suitable material can be used such as. or preferably an 18 Ni-Cr-Mo-14.6 alloy or a similar iron base alloy.
  • this circumferential jacket area 7 On the outside or outside circumference of this circumferential jacket area 7 is a profiled wear protection armor 8 formed, the protruding outwards Hard material strips 9 9 and existing in between Has depressions 10 in which regrind particles recorded and pressed into a layer, so to speak are, as indicated at 11. This pressed down Regrind layers 11 (in the depressions 10) thus form - in addition to the hard material strips 9 also an essential part of the wear protection armor 8th.
  • this wear protection armor 8 is now produced that in the material or in the roller base material of the peripheral jacket area 7 of the On the outside, negative profiles, for example in shape of profile grooves or grooves 12 are incorporated, whereby web-like profile projections 13 remain formed between two adjacent profile grooves 12 are or limit these profile grooves. Only on these profile projections 13 are the hard material strips 9 in layers by build-up welding appropriate hard material welded.
  • the groove-shaped depressions 10 (which include the profile grooves 12) have a clear cross section with a depth: width ratio (T: B) of approximately 0.4 to 0.75, the depth (T) is formed by the sum of the radial web height h 1 of the elaborated profile projections 13 and the radial material height h 2 of the hard material strips 9.
  • the material height h 2 of the hard material strips 9 is expediently chosen depending on the nature (in particular hardness and abrasiveness) of the ground material to be processed or comminuted and is approximately 3 to 15 mm, preferably approximately 4 to 8 mm, as is shown in FIG. 2 is indicated by different thickness representations in the different illustrated hard material strips 9.
  • the profile grooves 12 and thus the depressions 10 can in turn have a maximum cross-sectional width B of approximately 30 to 40 mm, depending on the material to be ground.
  • the grinding roller 2 a slightly wider in the axial direction provided edge strips 14 to provide, however - exactly as in the rest of the longitudinal section of the roller - basically also from a profile projection 13 welded hard material strip 9 there.
  • This Edge strips 14 can, depending on the use and width of the whole roller an axial width of about 20 to 50 mm have.
  • the profile grooves is also their cross-sectional shape of some importance as being special reliable holding of those in the wells 10 or profile grooves 12 pressed ground particles or ground material layer 11 is ensured.
  • at least the profile grooves 12 one have approximately rectangular to trapezoidal cross-section.
  • 2 is a rectangular one Cross section illustrated (with the light Width B and the total depth T).
  • a trapezoidal Cross section of the profile grooves 12 is in Figure 3 in a Partial longitudinal sectional view illustrates, accordingly the trapezoidal cross section is radial tapered outwards (towards the outside), i.e. the narrower trapezoidal sides of the groove cross section about on the outside of the circumference of the jacket so that a kind of undercut groove shape for the Profile grooves 12 results in a particularly good Press firmly and permanently hold the ground particle layer 11 is guaranteed.
  • Fig. 2 The profile of the wear protection armor profiles mentioned 8 can now be used for various purposes the roller 2 can be adjusted.
  • Fig. 2 it is assumed that the profile grooves 12 and the web-shaped profile projections 13 so in the peripheral jacket area 7 are incorporated that they run in the circumferential direction of the roller 2.
  • Fig.4 is on the other hand illustrates a way in which the Profile grooves 12 and the web-shaped profile projections 13 extend in the axial direction of the roller 2. Without it should be illustrated in more detail easily imagine that if necessary the profile grooves 12 and profile projections 13 also approximately helical or diagonally running on the outside of the peripheral jacket area 7 can be formed.
  • Roller 2 further if the hard material strips 9th made of a metal matrix with tungsten carbides embedded in it or tungsten carbide particles - by hard surfacing - are manufactured in which the Particle size about 0.1 to 2 mm, preferably about 0.2 up to 1.2 mm and the volume fraction of these tungsten carbides about 50 to 80% of the total volume of the welded Hard material strips 9 is.
  • These tungsten carbides can be in the form of tungsten carbides or tungsten pellets.
  • the metal matrix can be used for the embedded tungsten carbides made of an alloy containing Ni, Cr, B, Si, an iron-based alloy with the elements C, Mn, Si, Cr and Mo or from an unalloyed filler metal consist.
  • Roller 2 are several options based on of the two illustrated in cross section in Fig.1 Grinding rollers 2 are explained.
  • roller body 6 in a manner known per se a roller body 6a and one separately on this Roller base body 6a interchangeably attached roller shell consists of the peripheral jacket area described above 7 7 forms.
  • This one on its outside roller jacket provided with wear protection armor 8 can in turn be designed differently his.
  • This roller shell can now be made according to the Representation in the left half (the right roller) in 1 in the manner of an interchangeable bandage 7a fastened in a known manner on the roller base body 6a be on the outside using the Fig. 2 explained wear protection armor 8 8 his.
  • the drum-shaped roller jacket sort of divided into several jacket segments 7b which are exchangeable on the roller base body 6a are attached and then in turn on the outside the profile grooves explained in more detail with reference to FIG. 2 12 and profile projections 13 are formed.
  • Hard material strips 9 can be used in the appropriate one Thickness or material height due to build-up welding the profile projections 13 applied in different ways become.
  • One possibility for the type of surfacing and thus for the formation of wear protection armor 8 is that first the profile grooves 12th incorporated into the peripheral jacket area 7 of the roller body 6 and then on the outside of the next to the Profile grooves 12 stopped or between two adjacent profile grooves 12 remaining, web-like profile projections 13 the hard metal alloy welded to form the hard material strips 9 becomes.
  • Prefabrication of the profile grooves 12 and profile projections 13 be expedient, build-up welding of the hard metal alloy (to form the hard material strips 9) using molds, which the profile projections 13 during the implementation of the surfacing are assigned so that the Hard material strips 9 with particularly great shape accuracy or dimensional accuracy on the outside of the profile projections 13 can be applied.
  • the PTA plasma Transferred Arc
  • the MAG metal active gas
  • MIG metal inert gas
  • autogenous welding and welding with cored wires are particularly suitable Welding process preferred.
  • the profiled wear protection armor 8 8 can be an optimal width of the profile grooves 12 achieved with relatively narrow profile projections 13 be, the width of the profile grooves 12 many times depends on the grain size of the material to be crushed Feed good. This leads to a relatively small one Width of the profile projections 13 to a proportion low consumption of relatively expensive hard material for the hard material strips 9, without this - with attention an optimal ratio of Depth: Width (T: B) of the profile recesses 10 like explained above - a risk of breakage of the profile projections 13 (with the hard material strips applied to it 9) occur during high operational loads becomes.
  • the but-how 5 illustrates - the profile grooves 12 and the web-like profile projections 13 (with their on it welded hard material strips 9) on the peripheral jacket area the one grinding roller opposite the profile grooves and profile projections 13 / hard material strips 9 on the peripheral jacket area of the other, opposite Grinding roller 2 'is offset from one another in this way are that - except for relatively narrow end sections - each with pressed-in good particles (cf.
  • profile projections 13 preferably are approximately symmetrical to each other. This means so that the profile grooves 12 and profile projections of the two opposing grinding rollers 2, 2 'are mutually offset. In doing so, same axial roller width of both rollers the axial Edge strips 14 and 14 'appropriately one have different axial widths to each other and only directly opposite each other in the outermost edge area, as can be seen from Fig. 5.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (24)

  1. Cylindre, notamment cylindre de broyage pour la fragmentation de matières cassantes à broyer dans un broyeur à cylindres à lit de matière dans lequel deux cylindres de broyage (2), pouvant être entraínés à rotation en sens inverse, sont pressés l'un contre l'autre avec forte pression, comprenant un corps cylindrique (6) muni d'une zone d'enveloppe circonférentielle (7) dont la face extérieure comporte un blindage profilé (8) de protection contre l'usure, avec des bandes (9) en un matériau dur saillant vers l'extérieur, et des creusures intercalaires (10) renfermant des particules de matière enfoncées à force,
    caractérisé par la réalisation suivante du blindage (8) de protection contre l'usure :
    a) des profilages négatifs, revêtant sensiblement la forme de gorges profilées (12), sont ménagés depuis la face extérieure dans le matériau de la zone d'enveloppe circonférentielle (7), profilages dans lesquels les particules de matière sont enchâssées à force ;
    b) les bandes (9) en un matériau dur sont soudées uniquement sur les protubérances profilées (13), du type membrures, qui délimitent les gorges profilées (12).
  2. Cylindre selon la revendication 1, caractérisé par le fait que les creusures profilées (10) possèdent une section transversale ayant un rapport (T : B) profondeur : largeur d'environ 0,4 à 0,75, la profondeur (T) étant formée par la somme de la hauteur radiale (h1) des membrures des protubérances profilées (13) façonnées, et de la hauteur (h2) du matériau des bandes (9) en un matériau dur.
  3. Cylindre selon la revendication 2, caractérisé par le fait que la hauteur (h2) du matériau des bandes (9) en un matériau dur mesure d'environ 3 à 15 mm, préférentiellement d'environ 4 à 8 mm en fonction de la matière à traiter.
  4. Cylindre selon la revendication 2, caractérisé par le fait que les gorges profilées (12) possèdent une largeur maximale (B) de section transversale comprise entre environ 30 et 40 mm.
  5. Cylindre selon la revendication 2, caractérisé par le fait que les gorges profilées (12) possèdent une section transversale allant d'une forme sensiblement rectangulaire à une forme sensiblement trapézoïdale, la section transversale trapézoïdale se rétrécissant radialement vers l'extérieur.
  6. Cylindre selon la revendication 1, caractérisé par le fait que les gorges profilées (12), et les protubérances profilées (13) du type membrures, s'étendent dans la direction axiale dudit cylindre (2).
  7. Cylindre selon la revendication 1, caractérisé par le fait que les gorges profilées (12) et les protubérances profilées (13) s'étendent à peu près hélicoïdalement, ou dans la direction circonférentielle dudit cylindre (2).
  8. Cylindre selon la revendication 1, caractérisé par le fait que les bandes (9) en un matériau dur sont fabriquées à partir d'une matrice métallique, dans laquelle sont inclus des carbures de tungstène dont la taille de particules mesure d'environ 0,1 à 2 mm, préférentiellement d'environ 0,2 à 1,2 mm, et dont la part volumique représente d'environ 50 à 80 % du volume total des bandes métalliques rapportées par soudage.
  9. Cylindre selon la revendication 8, caractérisé par le fait que la matrice métallique, destinée aux carbures de tungstène inclus, consiste en un alliage renfermant du Ni, du Cr, du B, du Si, en un alliage à base de fer renfermant les éléments C, Mn, Si, Cr et Mo, ou en un métal d'apport non allié.
  10. Cylindre selon la revendication 1, caractérisé par le fait que le corps cylindrique (6) est fabriqué, conjointement à la zone d'enveloppe circonférentielle (7), en un matériau de base pour cylindres qui résiste à la pression et se prête bien au soudage, de préférence en un alliage 18 Ni-Cr-Mo-14,6.
  11. Cylindre selon la revendication 1, caractérisé par le fait que le corps cylindrique (6) est fabriqué, conjointement à sa zone d'enveloppe circonférentielle (7), sous la forme d'un cylindre massif en acier de forge ou en fonte.
  12. Cylindre selon la revendication 1, caractérisé par le fait que le corps cylindrique (6) est composé d'un corps cylindrique de base (6a) et d'un bandage (7a) qui forme la zone d'enveloppe circonférentielle, est fixé de manière interchangeable sur ce corps cylindrique de base, et dont la face extérieure est pourvue des gorges profilées (12) et des protubérances profilées (13) associées aux bandes (9) en un matériau dur.
  13. Cylindre selon la revendication 1, caractérisé par le fait que le corps cylindrique (6) est composé d'un corps cylindrique de base (6a) et d'un certain nombre de segments d'enveloppe (7b) qui forment une zone d'enveloppe circonférentielle fermée, sont fixés de manière interchangeable sur le corps cylindrique de base, et sur la face extérieure desquels sont ménagées les gorges profilées (12), et les protubérances profilées (13) associées aux bandes (9) en un matériau dur.
  14. Procédé pour la fabrication d'un cylindre, notamment d'un cylindre de broyage pour la fragmentation de matières cassantes à broyer dans un broyeur à cylindres à lit de matière dans lequel deux cylindres de broyage, pouvant être entraínés à rotation en sens inverse, sont pressés l'un contre l'autre avec forte pression, dans lequel est ménagé, sur la face extérieure de la zone d'enveloppe circonférentielle d'un corps cylindrique, un blindage profilé de protection contre l'usure qui comprend des bandes en un matériau dur saillant vers l'extérieur, et des creusures intercalaires renfermant des particules de matière enfoncées à force,
    caractérisé, en vue de la réalisation du blindage (8) de protection contre l'usure, par les étapes opératoires suivantes :
    a) des profilages négatifs, revêtant sensiblement la forme de gorges profilées (12), sont ménagés dans le matériau de la zone d'enveloppe circonférentielle (7) à partir de la face extérieure de cette dernière, profilages dans lesquels les particules de la matière à traiter sont reçues et enchâssées à force ;
    b) les bandes (9) en un matériau dur sont soudées uniquement sur des protubérances profilées (13) délimitant les gorges profilées (12).
  15. Procédé selon la revendication 14, caractérisé par le fait que les gorges profilées (12) sont produites avec une section transversale dont le rapport profondeur : largeur est d'environ 0,4 à 0,75, la profondeur totale (T) du profil étant formée par la somme de la hauteur (h1) des membrures des protubérances profilées (13), et de la hauteur (h2) du matériau des bandes (9) en un matériau dur.
  16. Procédé selon la revendication 15, caractérisé par le fait que les bandes (9) en un matériau dur sont fabriquées en un alliage métallique dur hautement résistant à l'usure et sont mises en place sur les protubérances profilées (13), par soudage en superposition, avec une hauteur de matériau (h2) d'environ 3 à 15 mm, préférentiellement d'environ 4 à 8 mm, qui dépend de la structure de la matière à traiter.
  17. Procédé selon la revendication 16, caractérisé par le fait qu'on utilise, pour les bandes (9) en un matériau dur, un alliage métallique dur qui renferme une matrice métallique dans laquelle sont inclus des carbures de tungstène d'une taille de particules comprise entre environ 0,1 et 2 mm, préférentiellement entre environ 0,2 et 1,2 mm, ainsi qu'avec une part volumique représentant d'environ 50 à 80 % du volume total desdites bandes en un matériau dur.
  18. Procédé selon la revendication 17, caractérisé par le fait que les gorges profilées (12) sont tout d'abord façonnées dans la zone d'enveloppe circonférentielle (7) du corps cylindrique (6), après quoi l'alliage métallique dur est rapporté par soudage sur la face extérieure des protubérances profilées (13), du type membrures, subsistant entre deux gorges profilées respectivement voisines.
  19. Procédé selon la revendication 18, caractérisé par le fait que les gorges profilées (12) et les protubérances profilées (13) du type membrures sont produites au stade de la coulée du corps cylindrique (6), ou par des fraisages pratiqués dans le matériau de la zone d'enveloppe circonférentielle (7).
  20. Procédé selon la revendication 18, caractérisé par le fait que le soudage en superposition de l'alliage métallique dur est exécuté en utilisant des coquilles de configuration, qui sont affectées aux protubérances profilées (13) au cours dudit soudage en superposition.
  21. Procédé selon la revendication 17, caractérisé par le fait que l'alliage métallique dur est tout d'abord rapporté par soudage sur la face extérieure de la zone d'enveloppe circonférentielle (7), sous la forme de bandes (9) en un matériau dur, d'après un modèle préétabli en concordance avec les gorges profilées (12) devant être pratiquées, après quoi lesdites gorges profilées (12) sont façonnées, de préférence par fraisage ou par tournage, dans la région située entre les bandes rapportées par soudage.
  22. Broyeur à cylindres à lit de matière pour la fragmentation de matières cassantes à broyer, équipé de deux çylindres de broyage (2, 2') qui peuvent être entraínés à rotation en sens inverse, sont pressés l'un contre l'autre avec forte pression et comportent, à chaque fois, un corps cylindrique muni d'une zone d'enveloppe circonférentielle dont la face extérieure présente un blindage profilé (8) de protection contre l'usure, comprenant des bandes (9) en un matériau dur saillant vers l'extérieur et des creusures intercalaires (12), renfermant des particules de matière enfoncées à force, caractérisé par le fait que le blindage (8) de protection contre l'usure de chaque cylindre de broyage (2, 2') est réalisé conformément à au moins l'une des revendications 1 à 21.
  23. Broyeur à cylindres à lit de matière, selon la revendication 22, caractérisé par le fait que les gorges profilées (12) et les protubérances profilées (13) du type membrures, situées dans la zone d'enveloppe circonférentielle de l'un (2) des cylindres de broyage, sont agencées, par rapport à celles situées dans la zone d'enveloppe circonférentielle de l'autre cylindre de broyage (2'), avec un décalage mutuel tel que - hormis dans de courtes régions extrêmes - des gorges profilées (12) emplies de particules de matière (11) enchâssées à force, et des protubérances profilées munies de bandes (9) en un matériau dur, soient respectivement disposées en vis-à-vis - de préférence symétriquement les unes par rapport aux autres -.
  24. Broyeur à cylindres à lit de matière, selon la revendication 22, caractérisé par le fait que les deux cylindres de broyage (2) sont réalisés avec façonnage similaire de gorges profilées (12), et de protubérances profilées (13) sur lesquelles des bandes (9) en un matériau dur sont rapportées par soudage, de telle sorte que des gorges profilées (12) et des protubérances profilées (13) des deux cylindres soient, à chaque fois, disposées exactement en vis-à-vis par leurs bandes (9) en un matériau dur.
EP95120153A 1995-02-24 1995-12-20 Cylindre, procédé pour la fabrication d'un cylindre et broyeur à cylindres à lit de matière Expired - Lifetime EP0728523B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19506600A DE19506600A1 (de) 1995-02-24 1995-02-24 Walze, Verfahren zur Herstellung einer Walze sowie Gutbettwalzenmühle
DE19506600 1995-02-24

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EP0728523A1 EP0728523A1 (fr) 1996-08-28
EP0728523B1 true EP0728523B1 (fr) 2000-03-08

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US (1) US5902685A (fr)
EP (1) EP0728523B1 (fr)
AU (1) AU690788B2 (fr)
BR (1) BR9600808A (fr)
CA (1) CA2166859A1 (fr)
DE (2) DE19506600A1 (fr)
ES (1) ES2143582T3 (fr)
ZA (1) ZA96867B (fr)

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DE102004025175B4 (de) * 2004-05-21 2006-07-06 Kerr-Mcgee Pigments Gmbh Gutbett-Walzenmühle

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DE59507959D1 (de) 2000-04-13
BR9600808A (pt) 1997-12-23
US5902685A (en) 1999-05-11
AU4222296A (en) 1996-09-05
AU690788B2 (en) 1998-04-30
ES2143582T3 (es) 2000-05-16
EP0728523A1 (fr) 1996-08-28
DE19506600A1 (de) 1996-08-29
ZA96867B (en) 1996-09-13
CA2166859A1 (fr) 1996-08-25

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